with youtube enhancer (there's also an open source one i wanted to check out but haven't yet) f.e. one can add a speed icon in interface on which the scroll wheel works, allowing dynamic speed adjuistment which, accompanied with [cursor left] to jump back a bit and [number keys] to jump to 0-90% position is amazing for extracting info. Also, muting videos, turning on captions and rushing through them without the mindfsck is a soul saver often times. Our current attention economy with its commercialization incentives hopefully is just a toxic glitch in history..